Mental health is a complex thing - it can depend on how you're feeling physically, how well you're taking care of yourself and what else is going on in your life. This chart tracks all of the above, and it can work in your bullet journal or as a spreadsheet, as you prefer.
The top section of the chart is for physical symptoms: If you're getting headaches, or can't sleep, you'll mark it there. The next section, highlighted above, is for habits that can affect your mood. If you're taking medication, you can track it here. There are also spaces for sleep, caffeine, alcohol and TV watching in this example. When you make your own, of course, you can adapt it to whatever habits matter to you personally.
The last section is for self-care, to make sure that you don't forget the essentials. Read more at the link below for other ways to track and manage your mental health.
Here's How to Use a Bullet Journal for Better Mental Health [BuzzFeed News]